all Chinese 4-stroke scooters are electrically (and mechanically) largely identical. The alleged large number of different manufacturers is due to a (political) EU import quota restriction. The engine type is GY-6 and is produced identical from 50 ccm to 150 ccm. Wiring diagrams are easy to find on the Internet - but the wiring is so simple that you can manage even without a diagram.
The CPI 2-stroke engines are Minarelli clones and also largely identical - mechanically they are available in a "short" and "long" design (based on the length of the crankcase / gearbox).